A novel estimation algorithm is introduced to handle the popular undersea problem called torpedo tracking with angle-only measurements with a better approach compared to the existing filters. The new algorithm produce...A novel estimation algorithm is introduced to handle the popular undersea problem called torpedo tracking with angle-only measurements with a better approach compared to the existing filters. The new algorithm produces a better estimate from the outputs produced by the traditional nonlinear approaches with the assistance of simple noise minimizers like maximum likelihood filter or any other algorithm which belongs to their family. The introduced method is extended to the higher version in two ways. The first approach extracts a better estimate and covariance by enhancing the count of the intermediate filters, while the second approach accepts more inputs so as to attain improved performance without enhancement of the intermediate filter count. The ideal choice of the placement of towed array sensors to improve the performance of the proposed method further is suggested as the one where the line of sight and the towed array are perpendicular. The results could get even better by moving the ownship in the direction of reducing range. All the results are verified in the MATLAB environment.展开更多
Open field system is the most important land farming system in the middle part of the Medieval England. It has the property of private property and common property right and exited for very long time. This article ana...Open field system is the most important land farming system in the middle part of the Medieval England. It has the property of private property and common property right and exited for very long time. This article analyzed how the open field system was replaced by the enclosure system from the perspective of institutional t transition. By carrying on the detailed investigation, it can provide certain enlightenments and references to deepen rural reform, especially promoting the reasonable transfer of rural land use rights in China.展开更多
文摘A novel estimation algorithm is introduced to handle the popular undersea problem called torpedo tracking with angle-only measurements with a better approach compared to the existing filters. The new algorithm produces a better estimate from the outputs produced by the traditional nonlinear approaches with the assistance of simple noise minimizers like maximum likelihood filter or any other algorithm which belongs to their family. The introduced method is extended to the higher version in two ways. The first approach extracts a better estimate and covariance by enhancing the count of the intermediate filters, while the second approach accepts more inputs so as to attain improved performance without enhancement of the intermediate filter count. The ideal choice of the placement of towed array sensors to improve the performance of the proposed method further is suggested as the one where the line of sight and the towed array are perpendicular. The results could get even better by moving the ownship in the direction of reducing range. All the results are verified in the MATLAB environment.
文摘Open field system is the most important land farming system in the middle part of the Medieval England. It has the property of private property and common property right and exited for very long time. This article analyzed how the open field system was replaced by the enclosure system from the perspective of institutional t transition. By carrying on the detailed investigation, it can provide certain enlightenments and references to deepen rural reform, especially promoting the reasonable transfer of rural land use rights in China.
